LeBron James hardly missed and scored 24 points in three quarters, Kyrie Irving scored 27, and Cleveland picked up where it left off before a long layoff by thumping the Toronto Raptors 115-84 in Game 1 of the Eastern Conference finals on Tuesday night in Cleveland.

James made his first nine shots — one an arena-rattling powerhouse dunk — and the Cavs, healthy and hungry after losing in the Finals a year ago, shot 67 percent from the field in the first half while improving to 9-0 this postseason. Cleveland is the first team to start the playoffs with nine straight wins since San Antonio reeled off 10 in a row in 2012.

“It’s our preparation,” James said in explaining the Cavs’ so-far-pristine postseason. “We understand the moment, and guys are rising to that.”

The 31-point win is the most lopsided in Cleveland’s postseason history.

But unlike their second-round series when they made 77 3-pointers and swept Atlanta, the Cavs did most of their damage from close range. Cleveland made just 7 of 20 3-point attempts.

DeMar DeRozan scored 18 points, and Bismack Biyombo added 12 for Toronto, which had just one day to prepare for the Cavs after going to seven games with Miami. Kyle Lowry was held to just eight as he and the Raptors made their first conference finals appearance.

Game 2 is Thursday night.

Cleveland figured to have some rust following a nine-day break since ousting the Hawks. But not only did the Cavs look refreshed, they looked better than before, taking their game to another level. And James, as is almost always the case, led the charge. He finished 11 of 13 from the field and added six rebounds and four assists in just 28 minutes. James spent the final quarter on the bench cheering on Cleveland’s reserves.

The Cavs outscored the Raptors 33-16 in the second quarter. Driving baseline past DeMarre Carroll, James cut across the lane and hammered home a right-handed windmill. He celebrated the slam by tilting his head, backpedaling and letting out a primal scream along with 20,000 fans.

Celtics: Kelly Olynyk had surgery on his injured right shoulder which bothered him late in the season. The team said that the 7-footer had arthroscopic surgery on the shoulder Monday. The procedure was for recurrent subluxations, or when the shoulder partially slips in and out of the socket.